Burner.



J. A. MAHR.

BURNER.

APPLICATION FILED M1048, 1913.

1 l 26,245. Patented J an. 26, 1915.

l x y UNTTED STATE PATENT @FFTQE JUIIUS A. MAI-IR, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO MAI-IR MANUFACTURING COMPANY, 0F MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA.

BURNER.

Specification of Letters Patent.

Patented Jan. 2e?, i915.

Application filed December 1 8, 1913. Serial No. 807,474.

T o all whom it may concern:

Be it known that I, JULIns A. MAHR, a citizen of the United States, resi'ding at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Burners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved oil burner, especially adapted for use in burning crude oil; and, to this end, it consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings z-Figure l is a plan view of the improved burner, some parts being broken away, and some of the exposed parts shown in section; Fig. 2 is a side elevation of the same; Fig. 3 is a detail View in longitudinal section taken on the line m3 x3 of Fig. LL, on an enlarged scale; Fig. 4 is a transverse section taken on the irregular line 004 :v4 of Fig. 3; and Fig. 5 is a detail view in transverse section taken on the line m5 x5 of Fig. 3.

The main body portion of the burner is in the form of a shell I, which constitutes the mixing chamber, and is open at both its receiving and discharge ends. At the discharge end of this shell l, and spaced apart therefrom, to form an air intake passage 2, is a nozzle 3, which, as shown, is connected to the shell 1 by integrally cast radial fins 4. In the construction shown in Fig. l, this nozzle 3 has a straight axis, but is contracted at its delivery end. In the construction shown in Fig. 2, the discharge nozzle 5 is curved, so as to deliver at one side, and the air passage 6 extends only on the under side ofthe shell l and partway up on each side thereof. It has been found, in actual usage, that the efficiency of the curved nozzle is increased by not extending the air passage completely therearound.

A casing 7 is screwed into the receiving end ofthe shell 1, and is formed with a cavity 8 which opens into the mixing chamber. Removably mounted in the cavity 8 is a spraying head comprising an annular collar 9 screwed into said cavity, and a pair of perforated disks or walls l0 and Il laterally spaced apart, to afford a chamber 12. The perforated disk l() extends transversely through the intermediate portion of the collar 9 and is integrally formed therewith. The perforated disk l1 is loosely seated in a seat I3, formed in the wall of the cavity 8, and is secured against removal therefrom by the collar 9, the inner edge of which is screwed thereagainst. The collar 9 is provided with a hexagon fiange, to which a wrench may be applied, for screwing the collar`9 into the cavity, or removing the same therefrom. This flange also acts as a stop to limit the inward movement of said collar. Completely surrounding the chamber l2, outward of the spraying head, is an annular oil passage 14, having communication with the chamber 12 through diametricallv opposite upper and lower ports l5, formed in the collar 9.

Extending into the casing 7 from the back thereof. is a valve chamber 1li, which extends parallel with and above the axis of the spraying head. The valve chamber 1G, together with the oil inlet port 17 and outlet port 18, forms an oil conduit. rThe inlet port 17 extends at right angles to the axis of the valve chamber IG and enters the same forward of its intermediate portion, while the outlet port 18 connects the inner end of the valve chamber 1G with the oil passage 14 and is axially alined with said valve chamber.

Slidably mounted in the valve chamber 16 is a combined slide valve 19 and needle valve 19, A set screw 20. having screw-threaded engagement with the casing 7. extends into the valve chamber 16. The inner end of this set screw extends into a longitudinally extended peripheral groove Q1. formed in the inner end of the valve 19. and holds said valve against rotation. but with freedom for sliding movement. Extended transversely through the inner end of the slide valve is a port 22 adapted to be moved into and out of registration with the inlet port 17. The needle valve 19a is integrally formed with the inner end of the slide valve 19. and is axially alined therewith. The seat for this needle valve 19a is in the receiving end of the outlet port 18.

, Endwise sliding movement is imparted to the combined valve by a long rod Q3, having screw-threaded engagement, at its inner end, with the slide valve 19. r1`his rod 23 extends within a long tube 24,`the inner end of which is screwed into the outer end portion of the valve chamber 1G, and on the outer end of which is secured a stufng box 25, through which the rod 23 works. |1`he outer end of the rod 23 is provided with a hand wheel 26, and said rod is held against endwise sliding movement, but with freedom for rotary movement, by a collar 27 mounted within the stufling box 25. Said collar 27 works between the outer end of the tube 24 and the outer end of the stuiiing box 25.

Air and oil delivery pipes 2S and 29, respectively, have their inner ends screwed into the casing 7. The inner or delivery end of the air pipe 28 is connected to the cavity 8, back of the spraying head, by a port 30, formed in the casing 7, and the delivery end of the oil pipe 29 taps the receiving end of the inlet port 17. @n the outer ends of the pipes 528 and 29 are hose couplers 31, only one of which is shown, to wit, the one on the pipe Q8. The flow of air through the pipe 28 is controlled by a valve 32 interposed in the said pipe just forward of the coupling 31. The outer ends of the tube 24- and pipes 28 and 29 are all connected and spaced apart by a bracket 33.

The flow of oil into the chamber 12 is regulated by adjusting the port 22 of the slide valve 19 over the delivery end of the inlet port 17. The blast of air, entering the cavity 8 through the port 30, blows through the perforated walls 10 and 11, breaks up the oil held therebetween in the chamber 1Q, and carries the same, in a fine spray, through the perforated wall 10 into the mixing chamber. The blast of air delivered through the mixing chamber into the nozzle, where the combustion takes place, will produce a strong force draft, which will draw a large amount of air into the nozzle 3 or 5 through the passage 6, thereby intensifying the combustion at or outward of the mouth of the nozzle. The flame will, of course, be discharged from said nozzle.

By mounting the operating rod in a long tube and placing thestuiing box at the outer end thereof, said lstuffing box will not be affected or damaged by the heat from the burner.

From the above description, it is evident that, by rotating the rod 23, endwise movement will be imparted to the combined valve. To shut off the oil supply, the sliding movement of the combined valve toward the spraying head will move the port 22 out of registration with the delivery end of the inlet port 17, thereby cutting ofi substantially all of the oil supply. By a continued movement of the combined valve in the saine direction, the needle valve 19e-will; enter the receiving end of the outlet port 1S, be seated therein, and thereby completely shut oif any oil which may leak around the sliding valve 19.

r1`he above described burner has gone into extensive use and been found highly etlicient for the purpose had in view.

lVhat I claim is 1. 1n an oil burner, the combination with a shell, constituting a mixing chamber, of a casing attached to said shell and having a cavity opening into said mixing chamber, a pair of flat, laterally spaced, perforated disks, seated in said cavity, an air conduit arranged to deliver air into said cavity and through said perforated disks, and an oil conduit opening into said cavity and arranged to deliver oil between said disks and transversely through the air passing through said chamber.

2. 1n an oil burner, the combination with a shell, constituting a mixing chamber, of a casing attached to said shell and having a cavity opening into said mixing chamber, a perforated disk loosely seated in said cavity, and extending transversely therethrough, a collar having a transversely extended perforated disk, said collar adapted to be screwec into said cavity, arranged to hold said loosely seated disk in position and to laterally soace said two disks to form therebetween a chamber, an air conduit arranged to deliver air into the bottom of said cavity, and through said perforated disks, and an oil conduit opening into the chamber between said two disks at one side thereof, to deliver oil transversely through the air passing through said chamber.

3. Iny an oil burner, the combination with a shell constituting` a mixing chamber, of a casing at the receiving end of said mixing chamber and a nozzle at the delivery end thereof, an auxiliary air passage between said mixing chamber and nozzle, said casing having a cavity in rear of said mixing chamber, a spraying head screwed into the cavity of said casing, having laterally spaced perforated walls affording a chamber therebetween, an oil passage surrounding said chamber, ports connecting said oil passage and chamber, an oil conduit arranged to deliver oil into said chamber, and an air conduit arranged to deliver air into the cavity of said casing back of said spraying head.

4. ln an oil burner, the combination with a shell constituting a mixing chamber, of a casing attached to said shell, air and oil conduits in said casing, arranged to deliver to said mixing chamber, a valve, having an extended operating rod, mounted in said casing for controlling the oil supply, and a tube attached, at one end, tov said casing, and having. at its other end, a stuffing' ist 5. In an oil burner, the combination with a shell constituting a mixing chamber. of a casing attached to said shell, air and oil conduits in said Casing, arranged to deliver to said mixing chamber, a valve chamber in said casing, interposed in said oil conduit, and two valves mounted in said valve cham ber, operated in unison to iirst cut off the oil supply entering said valve chamber, and to then cut oitl the oil supply leaving said valve chamber.

6. ln an oil burner, the combination With a shell, constituting a mixing chamber, of a casing, attached to said shell, a valve cha1nber in said casing, an oil inlet port leading to said valve chamber, an oil outlet port connecting said valve chamber with said mixing chamber, and a slide valve mounted in said valve chamber and having a port arranged to be moved into and out otI registration With said oil inlet port, said valve being arranged to open and close said oil outlet port.

7. In an oil burner, the combination with a shell, constituting a mixing chamber, of a casing attached to said shell, a valve chamber in said casing, an oil inlet port leading to said valve chamber, an oil outlet port connecting said valve chamber with said mixing chamber, and a combined slide and needle valve mounted in said valve chamber, said slide valve being arranged to open and close said oil inlet port, and said needle valve being arranged to open and close said oil outlet port, by a continued movement of said combined valve.

8. In an oil burner, the combination with a shell, constituting a mixing chamber, of a casing attached to said shell, a valve charnber in said casing, an oil inlet port leading to said valve chamber, an oil outlet port connecting said valve chamber with said mixing chamber, a combined slide and needle valve mounted in said valve charnber, said slide valve being arranged to open and close said oil inlet port, and said needle valve being arranged to open and close said oil outlet port, by a continued movement of said combined Valve, a tube attached, at one end, to said casing and having7 at its other end, a stui'ling box, a valve operating rod, mounted in said tube, Working through said stuiling box and having screw-threaded engagement with said valve, and a stop for holding said rod against endwise movement, but permitting rotary movement thereof.

ln testimony whereof I aiiiX my signature in presence of two Witnesses.

JULIUS A. MAHR.

Vitnesses:

EMiLY MAY'KING, HARRY D. KiLsoun.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

